I've never used Musicmatch but I've heard it's very good. Probably recognises more audio formats than iTunes can. The iTunes suggestion was just so your shared files would be easy to see & locate. iTunes does the organisation automatically once their added. Stick with what you're happy with.

Everytime I play a song from my library in LimeWire, it automatically adds it to my playlist. It's really annoying because after the song ends, it either plays it again, or plays the previous song on the playlist. How do I stop it from automatically adding songs to the playlist? I've searched all through the options.